I don't know if Thermage has any value for acne. But I can say that I went to a clinic that offers thermage amongst other treatments and, although I was clear that my main concern was acne scarring, they did not recommend thermage for this. Instead they recommended fraxel. (I had four fraxels. They did not make much of a difference to my acne scars. However, they did shrink my pores a bit, which helped reduce blackheads and generally improve my skin's health. I am now considering having a yearly fraxel if I have the spare money and time.)
What had a bigger difference, I think, was working out that my skin is highly sensitive to most products and that I have an allergy to soya. Soya derivatives are used in most products, which probably goes some way to explaining my sensitivity to them. For a while now I have been getting by without moisturiser by using pure squalane, mixed with a little water, instead. For sunscreen I use a little zinc powder mixed with water. This may sound radical to you but, if you want to experiment to find out if your skin is reacting to products, it might be worth spending a few weeks with a products-free routine like this, to see if there is any noticeable change. Working out that I was sensitive to certain foods (including any containing soya derivates, of course) also helped, of course. I appreciate that there are many reasons for bad skin so I do not mean to suggest that everyone's problem is allergies or sensitivities. But I have noticed that the professionals tend to push new drugs or therapies rather than recommending experimenting with identifying possible triggers, so thought it worth mentioning what worked for me.